Exploring Our World: Global Connections and Local Landscapes · 5th Year · Geographical Skills: Cartographic Analysis, Remote Sensing, and Fieldwork Investigation · Summer Term

Ordnance Survey Map Symbols

Students will learn to recognize and interpret common symbols used on Ordnance Survey maps.

• NCCA Curriculum Specifications
• NCCA: Primary - Maps, Globes and Graphical Skills
• NCCA: Primary - Using Pictures, Maps and Globes

About This Topic

Ordnance Survey map symbols provide a standardized visual language for representing Ireland's physical and human landscapes on 1:50,000 scale maps. Students identify symbols for natural features, such as contour lines for relief, blue lines for hydrology, and green shading for vegetation, alongside human elements like black lines for roads, black dots for settlements, and brown hatching for land use. These conventions allow quick interpretation of spatial patterns, from landform assemblages to transport networks and settlement hierarchies.

This topic aligns with NCCA standards on maps, globes, and graphical skills by developing cartographic analysis abilities. Students examine how symbol arrangements reveal geographical relationships, then compare successive OS map editions as primary sources to track changes in land use, infrastructure, and environment over decades. Such analysis fosters critical thinking about Ireland's evolving landscapes.

Active learning suits this topic well. When students handle real OS map extracts, match symbols in collaborative hunts, or overlay historic editions, they build fluency through direct engagement. These methods turn abstract symbols into practical tools, enhancing retention and application in fieldwork.

Key Questions

1. Differentiate between the OS map symbols representing natural features , including relief, hydrology, and vegetation cover , and human features , including transport networks, settlement morphology, and land-use categories , and explain how standardised symbol design conventions enable efficient communication of geographical information.
2. Analyse how the spatial arrangement of OS map symbols reveals underlying patterns of physical geography and human activity, using a specific 1:50,000 map extract to identify landform assemblages, settlement hierarchies, and transport infrastructure relationships.
3. Evaluate how comparative analysis of successive OS map editions functions as a primary source for tracking land-use change, infrastructure development, and environmental transformation in Ireland over time.

Learning Objectives

• Classify Ordnance Survey map symbols into categories of natural and human features.
• Explain how standardized symbol design conventions facilitate efficient communication of geographical information on maps.
• Analyze the spatial arrangement of OS map symbols on a 1:50,000 map extract to identify landform assemblages, settlement hierarchies, and transport infrastructure relationships.
• Evaluate how comparative analysis of successive OS map editions reveals land-use change and environmental transformation in Ireland over time.

Before You Start

Introduction to Maps and Globes

Why: Students need a foundational understanding of what maps represent and basic map elements before they can interpret specific symbols.

Representing Data Visually

Why: Understanding how charts and graphs use visual elements to convey information is helpful for grasping the concept of map symbols as a visual language.

Key Vocabulary

Contour lines	Lines on a map that connect points of equal elevation, used to represent relief and slope.
Hydrology symbols	Standardized markings on maps representing bodies of water like rivers, lakes, and canals, as well as drainage features.
Settlement morphology	The study of the form and structure of human settlements, often depicted on maps by patterns of buildings and roads.
Land-use categories	Specific symbols or patterns used on maps to denote different types of human activity or land cover, such as agriculture, forestry, or urban areas.
Cartographic conventions	Established rules and practices in mapmaking that ensure consistency and clarity in the representation of geographical information.

Watch Out for These Misconceptions

Common Misconception

All map symbols are the same worldwide.

What to Teach Instead

OS symbols are specific to Ireland's mapping conventions, differing from international standards. Hands-on matching activities with OS keys help students recognize unique designs, while group discussions clarify context-specific meanings.

Common Misconception

Maps show every feature at the same detail level.

What to Teach Instead

Symbols represent selected features based on scale and purpose, omitting minor details. Scavenger hunts on extracts reveal selection patterns, and peer teaching reinforces that abstraction aids efficient communication.

Common Misconception

Natural and human symbols are always easy to distinguish.

What to Teach Instead

Some symbols overlap in style, like lines for paths or rivers. Relay games sorting categories build differentiation skills, with collaborative review addressing overlaps through real examples.

Active Learning Ideas

Symbol Matching Relay: Natural vs Human

Prepare cards with OS symbols on one set and descriptions on another. In small groups, students race to match natural features like contours and rivers separately from human ones like roads and buildings. Groups discuss mismatches to refine understanding.

30 min·Small Groups

Map Extract Scavenger Hunt

Provide 1:50,000 OS map extracts. Students in pairs locate and list 15 symbols, noting spatial patterns such as river proximity to settlements. Pairs present one pattern to the class for verification.

45 min·Pairs

Historic Map Overlay Comparison

Supply paired OS maps from different eras. Whole class overlays transparencies to trace changes in symbols for roads or vegetation. Students annotate and discuss evidence of development.

50 min·Whole Class

Custom Map Symbol Design

Individuals draw a local area map using OS conventions, adding five natural and five human symbols. They swap with a partner for peer review on accuracy and clarity.

35 min·Individual

Real-World Connections

• Geographers and urban planners use Ordnance Survey maps daily to analyze land use, plan infrastructure development, and understand the spatial relationships between natural and built environments in areas like Dublin or rural County Clare.
• Emergency services, such as the National Ambulance Service or An Garda Síochána, rely on accurate OS maps and their standardized symbols for navigation, resource deployment, and incident response across Ireland.
• Historians and archaeologists utilize historical editions of OS maps to track changes in the landscape, identify the locations of former settlements or field systems, and understand the evolution of rural and urban areas over time.

Assessment Ideas

Quick Check

Provide students with a small extract of an OS map. Ask them to identify and list three natural features and three human features, writing down the specific symbol used for each. Review their lists for accuracy in symbol recognition and classification.

Exit Ticket

On a slip of paper, have students write down one OS map symbol they found challenging to interpret. Then, ask them to explain in one sentence how comparing two different editions of an OS map could reveal a change in land use in a specific Irish town or region.

Discussion Prompt

Pose the question: 'How do the standardized symbols on an Ordnance Survey map help someone who has never visited a particular area understand its geography?' Facilitate a class discussion, encouraging students to provide specific examples of symbols and their communicative power.

Frequently Asked Questions

What are the main OS map symbols for natural features?

Key symbols include brown contours for relief, blue lines for rivers and lakes, green shading for woodland or marsh, and spot heights for elevation. Students practice by tracing these on extracts, connecting them to Ireland's physical geography like the Wicklow Mountains or River Shannon.

How do OS symbols show human activity patterns?

Symbols depict transport with black lines of varying thickness for roads and railways, settlements as black dots or built-up areas, and land use via brown hatching for quarries or agriculture. Analysis of arrangements reveals hierarchies, such as motorways linking larger towns.

How does active learning help students master OS map symbols?

Activities like symbol relays and map hunts engage multiple senses, making abstract icons concrete. Collaborative tasks build fluency through peer explanation, while handling real extracts fosters confidence in interpreting patterns independently. This approach boosts retention over rote memorization.

Why compare old and new OS maps?

Successive editions track changes, such as new housing estates replacing farmland or motorway expansions. Overlay exercises highlight environmental shifts, equipping students to use maps as historical evidence in geography investigations.